APA (7th ed.) Citation

Schubring, G., & Richter, J. (1980). International bibliography of journals in mathematical education. Inst. für Didaktik der Math.

Chicago Style (17th ed.) Citation

Schubring, Gert, and Jutta Richter. International Bibliography of Journals in Mathematical Education. Bielefeld: Inst. für Didaktik der Math, 1980.

MLA (9th ed.) Citation

Schubring, Gert, and Jutta Richter. International Bibliography of Journals in Mathematical Education. Inst. für Didaktik der Math, 1980.