APA (7th ed.) Citation

Johnston, A. (1939). HOW TO BECOME A GREAT WRITER. Saturday Evening Post, 212(5), 5.

Chicago Style (17th ed.) Citation

Johnston, Alva. "HOW TO BECOME A GREAT WRITER." Saturday Evening Post 212, no. 5 (1939): 5.

MLA (9th ed.) Citation

Johnston, Alva. "HOW TO BECOME A GREAT WRITER." Saturday Evening Post, vol. 212, no. 5, 1939, p. 5.