Cita APA (7th ed.)

Spies, W., & Plummer, H. (1971). Albers. H.N. Abrams.

Cita Chicago (17th ed.)

Spies, Werner, i Herma Plummer. Albers. New York: H.N. Abrams, 1971.

Cita MLA (9th ed.)

Spies, Werner, i Herma Plummer. Albers. H.N. Abrams, 1971.