APA (7th ed.) Citation

O'Hair, M. M. (1969). What on earth is an atheist! American Atheist radio series..

Chicago Style (17th ed.) Citation

O'Hair, Madalyn M. "What on Earth Is an Atheist!" American Atheist Radio Series. 1969.

MLA (8th ed.) Citation

O'Hair, Madalyn M. "What on Earth Is an Atheist!" American Atheist Radio Series., 1969.

Warning: These citations may not always be 100% accurate.