APA (7th ed.) Citation

Clarkson, P. C. (1983). Types of errors made by Papua New Guinean Students. Mathematics Education Centre.

Chicago Style (17th ed.) Citation

Clarkson, Philip C. Types of Errors Made by Papua New Guinean Students. Lae: Mathematics Education Centre, 1983.

MLA (9th ed.) Citation

Clarkson, Philip C. Types of Errors Made by Papua New Guinean Students. Mathematics Education Centre, 1983.