APA (7th ed.) Citation

Langley, B. C. (1983). Estimating air condition system. Reston Publishing.

Chicago Style (17th ed.) Citation

Langley, Billy C. Estimating Air Condition System. Reston, Viginia: Reston Publishing, 1983.

MLA (9th ed.) Citation

Langley, Billy C. Estimating Air Condition System. Reston Publishing, 1983.

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