APA aipamena

Pierleoni, R., & Ghedi, R. A. (1963). Our earth and the universe: A Graflex program developed and tested by teachers. Graflex, Inc.

Chicago Style aipamena

Pierleoni, Robert, and Robert A. Ghedi. Our Earth and the Universe: A Graflex Program Developed and Tested by Teachers. Rochester, N.Y.: Graflex, Inc, 1963.

MLA aipamena

Pierleoni, Robert, and Robert A. Ghedi. Our Earth and the Universe: A Graflex Program Developed and Tested by Teachers. Graflex, Inc, 1963.