APA (7th ed.) Citation

Smidt, O. (1973). Engineering economics. Telephony.

Chicago Style (17th ed.) Citation

Smidt, Ollie. Engineering Economics. Chicago: Telephony, 1973.

MLA (9th ed.) Citation

Smidt, Ollie. Engineering Economics. Telephony, 1973.

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