Gaya APA

Swanson, C, P., Maratta, R. (1981). Drills and performance objectives for coaching track and field: featuring ì the challenge methods . New York: New York: Parker Publishing; 1981.

Gaya MLA

Swanson, Carl, P.., Maratta, Roy. "Drills and performance objectives for coaching track and field: featuring ì the challenge methods". New York: New York: Parker Publishing; 1981, 1981. Text.