APA (7th ed.) Citation

Helsted, D. (1972). Thorvaldsen's technique.

Chicago Style (17th ed.) Citation

Helsted, Dyveke. Thorvaldsen's Technique. 1972.

MLA (9th ed.) Citation

Helsted, Dyveke. Thorvaldsen's Technique. 1972.

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