APA (7th ed.) Citation

Flores, A., Lunacharsky, A. V., Engels, F., Mehring, F., & Plekhanov, G. V. (1937). Ibsen. Critics group.

Chicago Style (17th ed.) Citation

Flores, Angel, Anatoly Vasilievich Lunacharsky, Friedrich Engels, Franz Mehring, and Georgiĭ Valentinovich Plekhanov. Ibsen. New York: Critics group, 1937.

MLA (9th ed.) Citation

Flores, Angel, et al. Ibsen. Critics group, 1937.