APA (7e ed.) Bronvermelding

LEFFINGWELL RICHARD. (2019). BASIC MATH SHARING AND DIVIDING (2018 Ed.). HEINEMANN LIBRARY.

Chicago (17e ed.) Bronvermelding

LEFFINGWELL RICHARD. BASIC MATH SHARING AND DIVIDING. 2018 Ed. MINNESOTA: HEINEMANN LIBRARY, 2019.

MLA (9e ed.) Bronvermelding

LEFFINGWELL RICHARD. BASIC MATH SHARING AND DIVIDING. 2018 Ed. HEINEMANN LIBRARY, 2019.