Record day for the Berlin Airlift. (2013). The History Channel website. Retrieved 10:55, May 19, 2013, from http://www.history.com/this-day-in-history/record-day-for-the-berlin-airlift.
Record day for the Berlin Airlift. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/record-day-for-the-berlin-airlift [Accessed 19 May 2013].
“Record day for the Berlin Airlift.” 2013. The History Channel website. May 19 2013, 10:55 http://www.history.com/this-day-in-history/record-day-for-the-berlin-airlift.
“Record day for the Berlin Airlift,” The History Channel website, 2013, http://www.history.com/this-day-in-history/record-day-for-the-berlin-airlift [accessed May 19, 2013].
“Record day for the Berlin Airlift,” The History Channel website, http://www.history.com/this-day-in-history/record-day-for-the-berlin-airlift (accessed May 19, 2013).
Record day for the Berlin Airlift [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/this-day-in-history/record-day-for-the-berlin-airlift.
Record day for the Berlin Airlift, http://www.history.com/this-day-in-history/record-day-for-the-berlin-airlift (last visited May 19, 2013).
Record day for the Berlin Airlift. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/record-day-for-the-berlin-airlift. Accessed May 19, 2013.