APA (7th ed.) Citation

Scheinfeld, A. (1973). Twins and supertwins. Penguin Books.

Chicago Style (17th ed.) Citation

Scheinfeld, Amram. Twins and Supertwins. Baltimore, Md.: Penguin Books, 1973.

MLA (9th ed.) Citation

Scheinfeld, Amram. Twins and Supertwins. Penguin Books, 1973.

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