APA (7th ed.) Citation

Matkin, R. B., & Brookes, G. F. (1961). Snorkel diver : first steps in underwater swimming / by R.B. Matkin and G.F. Brookes: First steps in underwater swimming. Macdonald.

Chicago Style (17th ed.) Citation

Matkin, R. B., and G. F. Brookes. Snorkel Diver : First Steps in Underwater Swimming / by R.B. Matkin and G.F. Brookes: First Steps in Underwater Swimming. Macdonald, 1961.

MLA (9th ed.) Citation

Matkin, R. B., and G. F. Brookes. Snorkel Diver : First Steps in Underwater Swimming / by R.B. Matkin and G.F. Brookes: First Steps in Underwater Swimming. Macdonald, 1961.

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