APA (7e ed.) Bronvermelding

National Council of Teachers of Mathematics. (1926). Yearbook. National Council of Teachers of Mathematics.

Chicago (17e ed.) Bronvermelding

National Council of Teachers of Mathematics. Yearbook. [Place of publication not identified]: National Council of Teachers of Mathematics, 1926.

MLA (9e ed.) Bronvermelding

National Council of Teachers of Mathematics. Yearbook. National Council of Teachers of Mathematics, 1926.

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