Παραπομπή σε μορφή APA (7η εκδ.)

Summer Seminar on Applied Mathematics Cornell University, American Mathematical Society, & Ehlers, J. (1967). Relativity theory and astrophysics. American Mathematical Society.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Summer Seminar on Applied Mathematics Cornell University, American Mathematical Society, και J. Ehlers. Relativity Theory and Astrophysics. Providenve, R.I.: American Mathematical Society, 1967.

Παραπομπή σε μορφή MLA (9th εκδ.)

Summer Seminar on Applied Mathematics Cornell University, et al. Relativity Theory and Astrophysics. American Mathematical Society, 1967.