APA (7th ed.) Citation

Loon, H. W. v. (1937). Observations on the mystery of print and the work of Johann Gutenberg. Book Manufacturers' Inst.

Chicago Style (17th ed.) Citation

Loon, Hendrik Willem van. Observations on the Mystery of Print and the Work of Johann Gutenberg. New York: Book Manufacturers' Inst, 1937.

MLA (9th ed.) Citation

Loon, Hendrik Willem van. Observations on the Mystery of Print and the Work of Johann Gutenberg. Book Manufacturers' Inst, 1937.