Παραπομπή APA

Langley, B. C. (1978). Refrigeration and air conditioning. Reston publishing.

Παραπομπή Chicago Style

Langley, Billy C. Refrigeration and Air Conditioning. Reston: Reston publishing, 1978.

Παραπομπή MLA

Langley, Billy C. Refrigeration and Air Conditioning. Reston publishing, 1978.