APA (7th ed.) Citation

Gruger, C. E. (1981). Measuring commitment to physical activity. [publisher not identified].

Chicago Style (17th ed.) Citation

Gruger, Candace E. Measuring Commitment to Physical Activity. [Place of publication not identified]: [publisher not identified], 1981.

MLA (9th ed.) Citation

Gruger, Candace E. Measuring Commitment to Physical Activity. [publisher not identified], 1981.