Cita APA (7th ed.)

American Chemical Society. Division of the History of Chemistry & Benfey, O. T. (1966). Kekulé centennial. American Chemical Society.

Cita Chicago (17th ed.)

American Chemical Society. Division of the History of Chemistry i O. Theodor Benfey. Kekulé Centennial. Washington, DC: American Chemical Society, 1966.

Cita MLA (9th ed.)

American Chemical Society. Division of the History of Chemistry i O. Theodor Benfey. Kekulé Centennial. American Chemical Society, 1966.