APA citiranje
Dugan, R., & Cuwen, R. C. (1967). World beneath the sea. National Geographic Society.
Chicago Style (17th ed.) Citation
Dugan, Robert, and Robert C. Cuwen. World Beneath the Sea. National Geographic Society, 1967.
MLA citiranje
Dugan, Robert, and Robert C. Cuwen. World Beneath the Sea. National Geographic Society, 1967.
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