Lincoln imposes first federal income tax. (2013). The History Channel website. Retrieved 8:19, May 25, 2013, from http://www.history.com/this-day-in-history/lincoln-imposes-first-federal-income-tax.
Lincoln imposes first federal income tax. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/lincoln-imposes-first-federal-income-tax [Accessed 25 May 2013].
“Lincoln imposes first federal income tax.” 2013. The History Channel website. May 25 2013, 8:19 http://www.history.com/this-day-in-history/lincoln-imposes-first-federal-income-tax.
“Lincoln imposes first federal income tax,” The History Channel website, 2013, http://www.history.com/this-day-in-history/lincoln-imposes-first-federal-income-tax [accessed May 25, 2013].
“Lincoln imposes first federal income tax,” The History Channel website, http://www.history.com/this-day-in-history/lincoln-imposes-first-federal-income-tax (accessed May 25, 2013).
Lincoln imposes first federal income tax [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/lincoln-imposes-first-federal-income-tax.
Lincoln imposes first federal income tax, http://www.history.com/this-day-in-history/lincoln-imposes-first-federal-income-tax (last visited May 25, 2013).
Lincoln imposes first federal income tax. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/lincoln-imposes-first-federal-income-tax. Accessed May 25, 2013.