Jampel, B. (1989). Those wonderful dogs: A heart warming tribute to man's hardworking and loyal bestfriend. National Geographic Society.
Chicago-viite (17. p.)Jampel, Barbara. Those Wonderful Dogs: A Heart Warming Tribute to Man's Hardworking and Loyal Bestfriend. [New York]: National Geographic Society, 1989.
MLA-viite (9. p.)Jampel, Barbara. Those Wonderful Dogs: A Heart Warming Tribute to Man's Hardworking and Loyal Bestfriend. National Geographic Society, 1989.
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