APA (7e ed.) Bronvermelding

Não informado. (1947). Contributions from Bears Bluff Laboratories. Bears Bluff Laboratories.

Chicago (17e ed.) Bronvermelding

Não informado. Contributions from Bears Bluff Laboratories. Wadmalaw Island, SC: Bears Bluff Laboratories, 1947.

MLA (8e ed.) Bronvermelding

Não informado. Contributions from Bears Bluff Laboratories. Bears Bluff Laboratories, 1947.

Let op: Deze citaties zijn niet altijd 100% accuraat.