APA-viite (7. p.)

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.

Chicago-viite (17. p.)

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.

MLA-viite (9. p.)

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.