APA (7th ed.) Citation

Sullivan, W. (1970). We are not alone. Penguin Books.

Chicago Style (17th ed.) Citation

Sullivan, Walter. We Are Not Alone. Harmondsworth, England: Penguin Books, 1970.

MLA (9th ed.) Citation

Sullivan, Walter. We Are Not Alone. Penguin Books, 1970.

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