Prague Spring begins in Czechoslovakia. (2013). The History Channel website. Retrieved 9:01, May 22, 2013, from http://www.history.com/this-day-in-history/prague-spring-begins-in-czechoslovakia.
Prague Spring begins in Czechoslovakia. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/prague-spring-begins-in-czechoslovakia [Accessed 22 May 2013].
“Prague Spring begins in Czechoslovakia.” 2013. The History Channel website. May 22 2013, 9:01 http://www.history.com/this-day-in-history/prague-spring-begins-in-czechoslovakia.
“Prague Spring begins in Czechoslovakia,” The History Channel website, 2013, http://www.history.com/this-day-in-history/prague-spring-begins-in-czechoslovakia [accessed May 22, 2013].
“Prague Spring begins in Czechoslovakia,” The History Channel website, http://www.history.com/this-day-in-history/prague-spring-begins-in-czechoslovakia (accessed May 22, 2013).
Prague Spring begins in Czechoslovakia [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/prague-spring-begins-in-czechoslovakia.
Prague Spring begins in Czechoslovakia, http://www.history.com/this-day-in-history/prague-spring-begins-in-czechoslovakia (last visited May 22, 2013).
Prague Spring begins in Czechoslovakia. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/prague-spring-begins-in-czechoslovakia. Accessed May 22, 2013.