APA (7e ed.) Bronvermelding

Greggs R. G. Robert. (1959). Archaeocyatha From the Colville and Salmo Areas of Washington and British Columbia. [W. s.], The Paleontological Society, 1959.

Chicago (17e ed.) Bronvermelding

Greggs R. G. Robert. Archaeocyatha From the Colville and Salmo Areas of Washington and British Columbia. [W. s.], The Paleontological Society, 1959, 1959.

MLA (9e ed.) Bronvermelding

Greggs R. G. Robert. Archaeocyatha From the Colville and Salmo Areas of Washington and British Columbia. [W. s.], The Paleontological Society, 1959, 1959.