Serbien und die Serben ...
MLA
Gopčević, Spiridion, 1855-1936. Serbien und die Serben .... 1891.. https://collections.library.yale.edu/catalog/30075525.
APA, 6th edition
Gopčević, Spiridion, 1855-1936. (1891.)[Serbien und die Serben ...]. https://collections.library.yale.edu/catalog/30075525.