Cita APA (7a ed.)
Langley, B. C. Air Conditioning and Refrigeration Troubleshooting Handbook (2a edición.). Prentice-Hall.
Cita estilo Chicago (17a ed.)
Langley, Billy C. Air Conditioning and Refrigeration Troubleshooting Handbook. 2a edición. Upper Saddle River, EUA: Prentice-Hall.
Cita MLA (9a ed.)
Langley, Billy C. Air Conditioning and Refrigeration Troubleshooting Handbook. 2a edición. Prentice-Hall.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.