APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.