APA (7th ed.) Citation

Emmett, J., & Ridley, G. (1978). Underwater swimming / (by) John Emmett and Gordon Ridley. EP Publishing.

Chicago Style (17th ed.) Citation

Emmett, John, and Gordon Ridley. Underwater Swimming / (by) John Emmett and Gordon Ridley. Wakefield: EP Publishing, 1978.

MLA (9th ed.) Citation

Emmett, John, and Gordon Ridley. Underwater Swimming / (by) John Emmett and Gordon Ridley. EP Publishing, 1978.

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