APA (7th ed.) Citation

Mikhaĭlov, D., Marinov, D., & Smolenov, P. (1980). Bulgaria: A short tourist guide. Sofia Press.

Chicago Style (17th ed.) Citation

Mikhaĭlov, Dimitŭr, Dimcho Marinov, and Pancho Smolenov. Bulgaria: A Short Tourist Guide. London: Sofia Press, 1980.

MLA (9th ed.) Citation

Mikhaĭlov, Dimitŭr, et al. Bulgaria: A Short Tourist Guide. Sofia Press, 1980.