Firby, H. (1982). The Esso swim Canada program : instructor manual / [Howard Firby]: Instructor manual. Canadian Amateur Swimming Association.
Chicago Style (17th ed.) CitationFirby, Howard. The Esso Swim Canada Program : Instructor Manual / [Howard Firby]: Instructor Manual. Gloucester, ON: Canadian Amateur Swimming Association, 1982.
MLA (9th ed.) CitationFirby, Howard. The Esso Swim Canada Program : Instructor Manual / [Howard Firby]: Instructor Manual. Canadian Amateur Swimming Association, 1982.
Warning: These citations may not always be 100% accurate.