APA (7th ed.) Zitazioa

Schuller, R. (1946). Living positively one day at a time. New York international bible society.

Chicago Style (17th ed.) Zitazioa

Schuller, Robert. Living Positively One Day at a Time. New York: New York international bible society, 1946.

MLA (9th ed.) Zitazioa

Schuller, Robert. Living Positively One Day at a Time. New York international bible society, 1946.