Gaya APA

Baker, R, H. (1967). An Introduction to Astronomy (Cet. 1.--). New York: Van Nostrand Reinhol Cmpany Inc.

Gaya MLA

Baker, Robert, H.. "An Introduction to Astronomy". Cet. 1.-- New York: Van Nostrand Reinhol Cmpany Inc, 1967. Text.