Παραπομπή σε μορφή APA (7η εκδ.)

Batista, C. (2014). Generalizing the Petrov Classification: On the pursuit of generalizations for the Petrov Classification and the Goldberg-Sachs Theorem (1a. ed.). Lambert Academic Publishing.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Batista, Carlos. Generalizing the Petrov Classification: On the Pursuit of Generalizations for the Petrov Classification and the Goldberg-Sachs Theorem. 1a. ed. Sarrebruck: Lambert Academic Publishing, 2014.

Παραπομπή σε μορφή MLA (9th εκδ.)

Batista, Carlos. Generalizing the Petrov Classification: On the Pursuit of Generalizations for the Petrov Classification and the Goldberg-Sachs Theorem. 1a. ed. Lambert Academic Publishing, 2014.