APA (7th ed.) Citation

Purcell, G. R. (1971). Reference Books of 1970.

Chicago Style (17th ed.) Citation

Purcell, Gary R. Reference Books of 1970. 1971.

MLA (9th ed.) Citation

Purcell, Gary R. Reference Books of 1970. 1971.

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