An introduction to animal biology,
by John B. Parker ... and John J. Clarke ...
APA Citation
Parker, J. Bernard., Clarke, J. Joseph. (1939). An introduction to animal biology. St. Louis: The C. V. Mosby Company.
MLA Citation
Parker, John Bernard, 1870-, and John Joseph Clarke. An Introduction to Animal Biology. St. Louis: The C. V. Mosby Company, 1939.
Warning: These citations may not always be complete (especially for serials).