Gaya APA

Shipman, H, L. (1978). Black Holes Quasarars, And The Universe (Ed. 2). Boston: Houghtn Mifflin Company.

Gaya MLA

Shipman, Hary, L.. "Black Holes Quasarars, And The Universe". Ed. 2 Boston: Houghtn Mifflin Company, 1978. Text.