Gaya APA

Cornelius, E, T., Sheeler, W, D. (1978). The key to English : Letter writing (1978). : New York : Macmillan Int. Inc.,.

Gaya MLA

Cornelius, Edwin, T., Sheeler, Willard, D. "The key to English : Letter writing". 1978 : New York : Macmillan Int. Inc.,, 1978. Text.