Harrison, R. J., & Kooymans, G. L. (1981). Diving in marine mammals (2nd ed. rev.). Scientific Publications Dept., Carolina Biological Supply Co..
Lua i Stíl Chicago (17ú heag.)Harrison, Richard John, agus Gerald L. Kooymans. Diving in Marine Mammals. 2nd ed. rev. Burlington, NC: Scientific Publications Dept., Carolina Biological Supply Co., 1981.
Lua MLA (9ú heag.)Harrison, Richard John, agus Gerald L. Kooymans. Diving in Marine Mammals. 2nd ed. rev. Scientific Publications Dept., Carolina Biological Supply Co., 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.