Cita APA (7a ed.)

Birtwell, H. C. (1970). VOCATIONAL training in New York city -- where to find it: A directory (19th aniversary ed.). Vocational Advisory Service.

Cita Chicago Style (17a ed.)

Birtwell, Helen C. VOCATIONAL Training in New York City -- Where to Find It: A Directory. 19th aniversary ed. New York: Vocational Advisory Service, 1970.

Cita MLA (8a ed.)

Birtwell, Helen C. VOCATIONAL Training in New York City -- Where to Find It: A Directory. 19th aniversary ed. Vocational Advisory Service, 1970.