First edition of Walt Whitman's Leaves of Grass is published. (2013). The History Channel website. Retrieved 6:45, May 21, 2013, from http://www.history.com/this-day-in-history/first-edition-of-walt-whitmans-leaves-of-grass-is-published.
First edition of Walt Whitman's Leaves of Grass is published. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/first-edition-of-walt-whitmans-leaves-of-grass-is-published [Accessed 21 May 2013].
“First edition of Walt Whitman's Leaves of Grass is published.” 2013. The History Channel website. May 21 2013, 6:45 http://www.history.com/this-day-in-history/first-edition-of-walt-whitmans-leaves-of-grass-is-published.
“First edition of Walt Whitman's Leaves of Grass is published,” The History Channel website, 2013, http://www.history.com/this-day-in-history/first-edition-of-walt-whitmans-leaves-of-grass-is-published [accessed May 21, 2013].
“First edition of Walt Whitman's Leaves of Grass is published,” The History Channel website, http://www.history.com/this-day-in-history/first-edition-of-walt-whitmans-leaves-of-grass-is-published (accessed May 21, 2013).
First edition of Walt Whitman's Leaves of Grass is published [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/first-edition-of-walt-whitmans-leaves-of-grass-is-published.
First edition of Walt Whitman's Leaves of Grass is published, http://www.history.com/this-day-in-history/first-edition-of-walt-whitmans-leaves-of-grass-is-published (last visited May 21, 2013).
First edition of Walt Whitman's Leaves of Grass is published. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/first-edition-of-walt-whitmans-leaves-of-grass-is-published. Accessed May 21, 2013.