Παραπομπή σε μορφή APA (7η εκδ.)

Barrett, W. W., Johnson, C. R., & Loewy, R. (1996). The real positive definite completion problem: Cycle completability. American Mathematical Society.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Barrett, Wayne W., Charles R. Johnson, και Raphael Loewy. The Real Positive Definite Completion Problem: Cycle Completability. Providence, Rhode island: American Mathematical Society, 1996.

Παραπομπή σε μορφή MLA (9th εκδ.)

Barrett, Wayne W., et al. The Real Positive Definite Completion Problem: Cycle Completability. American Mathematical Society, 1996.