एपीए उद्धरण

Heckel, P. (1984). Elements friendly software design. A Warner Communications Company.

शिकागो स्टाइल उद्धरण

Heckel, Paul. Elements Friendly Software Design. USA: A Warner Communications Company, 1984.

एमएलए उद्धरण

Heckel, Paul. Elements Friendly Software Design. A Warner Communications Company, 1984.