APA (7th ed.) Citation

Simons, H. J., & Simons, R. E. (1989). The Simons papers. Nordiska Afrikainstitutet.

Chicago Style (17th ed.) Citation

Simons, H. J., and R. E. Simons. The Simons Papers. Uppsala, Sweden: Nordiska Afrikainstitutet, 1989.

MLA (8th ed.) Citation

Simons, H. J., and R. E. Simons. The Simons Papers. Nordiska Afrikainstitutet, 1989.