APA aipamena

Heppner, F. H. (1990). Professor Farnsworth's explanations in biology. McGraw-Hill.

Chicago Style aipamena

Heppner, Frank H. Professor Farnsworth's Explanations in Biology. New York: McGraw-Hill, 1990.

MLA aipamena

Heppner, Frank H. Professor Farnsworth's Explanations in Biology. McGraw-Hill, 1990.