Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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