Cita APA (7a ed.)

Haanstra, U., & Spiker, E. (1935). Geologie von Ibiza(Baleares). Tip. Hostench.

Cita Chicago Style (17a ed.)

Haanstra, U., y E.Th.N Spiker. Geologie Von Ibiza(Baleares). [Barcelona]: Tip. Hostench, 1935.

Cita MLA (9a ed.)

Haanstra, U., y E.Th.N Spiker. Geologie Von Ibiza(Baleares). Tip. Hostench, 1935.