APA (7th ed.) Citation

Perkins, R. L., & Kierkegaard, S. (1985). The concept of anxiety. International Kierkegaard commentary.

Chicago Style (17th ed.) Citation

Perkins, Robert L., and Søren Kierkegaard. "The Concept of Anxiety." International Kierkegaard Commentary 1985.

MLA (8th ed.) Citation

Perkins, Robert L., and Søren Kierkegaard. "The Concept of Anxiety." International Kierkegaard Commentary, 1985.

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