APA (7e ed.) Bronvermelding

Subong, N. L. (1971). The teaching difficulties of elementary school teachers of modern mathematics in some selected public schools in Manila.

Chicago (17e ed.) Bronvermelding

Subong, Nieva Liberia. The Teaching Difficulties of Elementary School Teachers of Modern Mathematics in Some Selected Public Schools in Manila. 1971.

MLA (9e ed.) Bronvermelding

Subong, Nieva Liberia. The Teaching Difficulties of Elementary School Teachers of Modern Mathematics in Some Selected Public Schools in Manila. 1971.