APA (7th ed.) Citation

Drachmann, A. B. (1922). Atheism in pagan antiquity. Gyldendal.

Chicago Style (17th ed.) Citation

Drachmann, A. B. Atheism in Pagan Antiquity. London [etc.]: Gyldendal, 1922.

MLA (9th ed.) Citation

Drachmann, A. B. Atheism in Pagan Antiquity. Gyldendal, 1922.

Warning: These citations may not always be 100% accurate.