Cita APA (7a ed.)

Fries, T. M. (1861). Genera heterolichenum Europaea recognita. Edquist et Soc..

Cita Chicago Style (17a ed.)

Fries, Theodor Magnus. Genera Heterolichenum Europaea Recognita. Upsaliae: Edquist et Soc., 1861.

Cita MLA (8a ed.)

Fries, Theodor Magnus. Genera Heterolichenum Europaea Recognita. Edquist et Soc., 1861.