Παραπομπή APA

May, J. P., & Baez, J. C. (2010). Towards higher categories. Springer.

Παραπομπή Chicago Style

May, J. Peter, και John C. Baez. Towards Higher Categories. New York: Springer, 2010.

Παραπομπή MLA

May, J. Peter, και John C. Baez. Towards Higher Categories. Springer, 2010.