Παραπομπή σε μορφή APA (7η εκδ.)

Petersen, W. L. (1985). The Diatessaron and Ephrem Syrus as sources of Romanos the Melodist. E. Peeters.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Petersen, William Lawrence. The Diatessaron and Ephrem Syrus as Sources of Romanos the Melodist. Lovanii: E. Peeters, 1985.

Παραπομπή σε μορφή MLA (8th εκδ.)

Petersen, William Lawrence. The Diatessaron and Ephrem Syrus as Sources of Romanos the Melodist. E. Peeters, 1985.