APA (7th ed.) Citation

O'Hair, M. M. (1972). What on earth is an atheist! Arno Press.

Chicago Style (17th ed.) Citation

O'Hair, Madalyn Murray. What on Earth Is an Atheist! New York: Arno Press, 1972.

MLA (9th ed.) Citation

O'Hair, Madalyn Murray. What on Earth Is an Atheist! Arno Press, 1972.