Labuda, K. (1981). Activity profiles for three water-based recreational activities: Scubadiving-snorkelling, swimming and shore uses. Parks Canada.
Cita Chicago Style (17a ed.)Labuda, Kathy. Activity Profiles for Three Water-based Recreational Activities: Scubadiving-snorkelling, Swimming and Shore Uses. Canada: Parks Canada, 1981.
Cita MLA (8a ed.)Labuda, Kathy. Activity Profiles for Three Water-based Recreational Activities: Scubadiving-snorkelling, Swimming and Shore Uses. Parks Canada, 1981.
Precaución: Estas citas no son 100% exactas.