Cita APA
Heppner, F. H. (1990). Professor Farnsworth's explanations in biology. McGraw-Hill.
Citación estilo Chicago
Heppner, Frank H. Professor Farnsworth's Explanations in Biology. New York: McGraw-Hill, 1990.
Cita MLA
Heppner, Frank H. Professor Farnsworth's Explanations in Biology. McGraw-Hill, 1990.
Warning: These citations may not always be 100% accurate.