Cita APA (7a ed.)

Etling, F. R. (1978). Intermediate string techniques. Forest R. Etling.

Cita Chicago Style (17a ed.)

Etling, Forest R. Intermediate String Techniques. Elgin: Forest R. Etling, 1978.

Cita MLA (9a ed.)

Etling, Forest R. Intermediate String Techniques. Forest R. Etling, 1978.