APA (7th ed.) Citation

Jonsson, C. O., & Herbst, W. (1987). The "sign" of the last days - when? Commentary Press.

Chicago Style (17th ed.) Citation

Jonsson, Carl Olof, and Wolfgang Herbst. The "Sign" of the Last Days - When? Atlanta: Commentary Press, 1987.

MLA (9th ed.) Citation

Jonsson, Carl Olof, and Wolfgang Herbst. The "Sign" of the Last Days - When? Commentary Press, 1987.

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