APA (7th ed.) Citation

Godwin, D. C. (1971). Mathematical thinking (1st rev. ed.). Mathematics Dept., University of Papua and New Guinea.

Chicago Style (17th ed.) Citation

Godwin, D. C. Mathematical Thinking. 1st rev. ed. [Port Moresby]: Mathematics Dept., University of Papua and New Guinea, 1971.

MLA (9th ed.) Citation

Godwin, D. C. Mathematical Thinking. 1st rev. ed. Mathematics Dept., University of Papua and New Guinea, 1971.