Παραπομπή APA

Halliwell, J. D. a. T. A. E. (1977). Course in standard coral 66. NCC.

Παραπομπή Chicago Style

Halliwell, J D and T A Edwards. Course in Standard Coral 66. England: NCC, 1977.

Παραπομπή MLA

Halliwell, J D and T A Edwards. Course in Standard Coral 66. NCC, 1977.