Παραπομπή σε μορφή APA (7η εκδ.)

Symposium in Pure Mathematics, American Mathematical Society, & Heller, A. (1970). Applications of categorical algebra: [proceedings. American Mathematical Society.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Symposium in Pure Mathematics, American Mathematical Society, και Alex Heller. Applications of Categorical Algebra: [proceedings. Providence, R.I.: American Mathematical Society, 1970.

Παραπομπή σε μορφή MLA (9th εκδ.)

Symposium in Pure Mathematics, et al. Applications of Categorical Algebra: [proceedings. American Mathematical Society, 1970.