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First U.S. helicopter is shot down in Vietnam.

APA Style

First U.S. helicopter is shot down in Vietnam.. (2013). The History Channel website. Retrieved 12:22, May 19, 2013, from http://www.history.com/this-day-in-history/first-us-helicopter-is-shot-down-in-vietnam.

Harvard Style

First U.S. helicopter is shot down in Vietnam.. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/first-us-helicopter-is-shot-down-in-vietnam [Accessed 19 May 2013].

MLA Style

“First U.S. helicopter is shot down in Vietnam..” 2013. The History Channel website. May 19 2013, 12:22 http://www.history.com/this-day-in-history/first-us-helicopter-is-shot-down-in-vietnam.

MHRA Style

“First U.S. helicopter is shot down in Vietnam.,” The History Channel website, 2013, http://www.history.com/this-day-in-history/first-us-helicopter-is-shot-down-in-vietnam [accessed May 19, 2013].

Chicago Style

“First U.S. helicopter is shot down in Vietnam.,” The History Channel website, http://www.history.com/this-day-in-history/first-us-helicopter-is-shot-down-in-vietnam (accessed May 19, 2013).

CBE/CSE Style

First U.S. helicopter is shot down in Vietnam. [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/this-day-in-history/first-us-helicopter-is-shot-down-in-vietnam.

Bluebook Style

First U.S. helicopter is shot down in Vietnam., http://www.history.com/this-day-in-history/first-us-helicopter-is-shot-down-in-vietnam (last visited May 19, 2013).

AMA Style

First U.S. helicopter is shot down in Vietnam.. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/first-us-helicopter-is-shot-down-in-vietnam. Accessed May 19, 2013.