Gaya APA

Burka, J, B., M.Yuen, L. (1983). Procrastination; Why You Do It, What to Do About It . New York: Wesley Publishing Company.

Gaya MLA

Burka, Jane, B.., M.Yuen, Lenora. "Procrastination; Why You Do It, What to Do About It". New York: Wesley Publishing Company, 1983. Text.