APA (7th ed.) Citation

Piper, H. B. (1981). Empire. Ace Science.

Chicago Style (17th ed.) Citation

Piper, H. Beam. Empire. New York: Ace Science, 1981.

MLA (8th ed.) Citation

Piper, H. Beam. Empire. Ace Science, 1981.

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