Dyfyniad APA

U.S. Office of Education. Vocational Division & U.S. Federal board for vocational education. (1917). Bulletin. no. 1-. U.S. Govt. print. off.

Dyfyniad Arddull Chicago

U.S. Office of Education. Vocational Division and U.S. Federal board for vocational education. Bulletin. No. 1-. Washington: U.S. Govt. print. off, 1917.

Dyfyniad MLA

U.S. Office of Education. Vocational Division and U.S. Federal board for vocational education. Bulletin. No. 1-. U.S. Govt. print. off, 1917.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.