APA (7e ed.) Bronvermelding

Não informado. (1971). NCSDHA dental hygienist. Northern Californis State Dental Hygienists.

Chicago (17e ed.) Bronvermelding

Não informado. NCSDHA Dental Hygienist. San Francisco, Calif: Northern Californis State Dental Hygienists, 1971.

MLA (8e ed.) Bronvermelding

Não informado. NCSDHA Dental Hygienist. Northern Californis State Dental Hygienists, 1971.

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