Blandford, L. F. (1980). Snorkelling manual : a guide to snorkel diving for the use of instructors and pupils in the BS-AC National Snorkellers Club: A guide to snorkel diving for the use of instructors and pupils in the BS-AC National Snorkellers Club (3rd ed.).
Chicago Style (17th ed.) CitationBlandford, Lionel Frederick. Snorkelling Manual : A Guide to Snorkel Diving for the Use of Instructors and Pupils in the BS-AC National Snorkellers Club: A Guide to Snorkel Diving for the Use of Instructors and Pupils in the BS-AC National Snorkellers Club. 3rd ed. London ; British Sub-Aqua Club ; Eyre & Spottiswode, 1980.
MLA (9th ed.) CitationBlandford, Lionel Frederick. Snorkelling Manual : A Guide to Snorkel Diving for the Use of Instructors and Pupils in the BS-AC National Snorkellers Club: A Guide to Snorkel Diving for the Use of Instructors and Pupils in the BS-AC National Snorkellers Club. 3rd ed. 1980.