APA

Milev G., Randov N. & Markov G. (1973). September. Sofia: Sofia-Press.

Chicago

Milev Geo, Randov Norbert and Markov Georgi. 1973. September. Sofia: Sofia-Press.

Harvard

Milev G., Randov N. and Markov G. (1973). September. Sofia: Sofia-Press.

MLA

Milev Geo, Randov Norbert and Markov Georgi. September. Sofia: Sofia-Press. 1973.