Cita APA (7a ed.)

Unknown. (2023). The naturalists’ directory. Samuel E. Cassino, U.S.A.

Cita Chicago Style (17a ed.)

Unknown. The Naturalists’ Directory. Samuel E. Cassino, U.S.A, 2023.

Cita MLA (9a ed.)

Unknown. The Naturalists’ Directory. Samuel E. Cassino, U.S.A, 2023.