Cita APA (7a ed.)

Watkins, R., & Masters, T. (2005). Bulgaria (2nd ed.). Lonely Planet.

Cita Chicago Style (17a ed.)

Watkins, Richard, y Tom Masters. Bulgaria. 2nd ed. Victoria: Lonely Planet, 2005.

Cita MLA (9a ed.)

Watkins, Richard, y Tom Masters. Bulgaria. 2nd ed. Lonely Planet, 2005.