APA (7th ed.) Citation

Holst, H. (1923). Opfindelsernes Bog. Gyldendal.

Chicago Style (17th ed.) Citation

Holst, Helge. Opfindelsernes Bog. Kopenhagen [u.a.]: Gyldendal, 1923.

MLA (9th ed.) Citation

Holst, Helge. Opfindelsernes Bog. Gyldendal, 1923.

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