APA (7th ed.) Citation

Petrill, J. (1949). After the whistle blows: A guide to the field of recreation in industry. William-Frederick Pr.

Chicago Style (17th ed.) Citation

Petrill, Jack. After the Whistle Blows: A Guide to the Field of Recreation in Industry. New York: William-Frederick Pr, 1949.

MLA (9th ed.) Citation

Petrill, Jack. After the Whistle Blows: A Guide to the Field of Recreation in Industry. William-Frederick Pr, 1949.

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