Dyfyniad APA

Pasachoff, J. M. (1992). Journey through the universe. Saunders College Publishing.

Dyfyniad Arddull Chicago

Pasachoff, Jay M. Journey Through the Universe. Forth worth: Saunders College Publishing, 1992.

Dyfyniad MLA

Pasachoff, Jay M. Journey Through the Universe. Saunders College Publishing, 1992.

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