APA (7th ed.) Citation

Pyle, F. W. An ancient people and their problems. Philippine Press Bureau.

Chicago Style (17th ed.) Citation

Pyle, Frank Wilkes. An Ancient People and Their Problems. [Washington, D.C: Philippine Press Bureau.

MLA (9th ed.) Citation

Pyle, Frank Wilkes. An Ancient People and Their Problems. Philippine Press Bureau.

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