APA (7th ed.) Citation

Heckel, V. Climbing in the Caucasus. Spring Books.

Chicago Style (17th ed.) Citation

Heckel, Vilém. Climbing in the Caucasus. London: Spring Books.

MLA (9th ed.) Citation

Heckel, Vilém. Climbing in the Caucasus. Spring Books.

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