APA (7e ed.) Bronvermelding

Wichai Bunchua. (1968). Modern concepts and methods in grade I mathematics: A proposed syllabus for elementary school mathematics.

Chicago (17e ed.) Bronvermelding

Wichai Bunchua. Modern Concepts and Methods in Grade I Mathematics: A Proposed Syllabus for Elementary School Mathematics. 1968.

MLA (9e ed.) Bronvermelding

Wichai Bunchua. Modern Concepts and Methods in Grade I Mathematics: A Proposed Syllabus for Elementary School Mathematics. 1968.