Παραπομπή APA

Leavitt, W. ,., & Skinner, R. M. ,. (1962). Speaking of space: The best from Space digest. Boston: little, Brown and Company.

Παραπομπή Chicago Style

Leavitt, William ,, και Richard M. Skinner. Speaking of Space: The Best From Space Digest. Boston: little, Brown and Company, 1962.

Παραπομπή MLA

Leavitt, William ,, και Richard M. Skinner. Speaking of Space: The Best From Space Digest. Boston: little, Brown and Company, 1962.

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