APA (7th ed.) Citation

McGregor, R. C. (1940). An introduction to Philippine birds. Bureau of Printing.

Chicago Style (17th ed.) Citation

McGregor, Richard Crittenden. An Introduction to Philippine Birds. Manila: Bureau of Printing, 1940.

MLA (9th ed.) Citation

McGregor, Richard Crittenden. An Introduction to Philippine Birds. Bureau of Printing, 1940.

Warning: These citations may not always be 100% accurate.