एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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