APA (7th ed.) Citation

Gibbs, R. (1981). Exercise for the over-50s (1. print.). Norman.

Chicago Style (17th ed.) Citation

Gibbs, Russell. Exercise for the Over-50s. 1. print. London: Norman, 1981.

MLA (9th ed.) Citation

Gibbs, Russell. Exercise for the Over-50s. 1. print. Norman, 1981.