American Sunday-School Union & A. E. P. (1859). The land of mystery: Or, Scenes and incidents in Central Africa. American Sunday-School Union.
Chicago-referens (17:e uppl.)American Sunday-School Union och A. E. P. The Land of Mystery: Or, Scenes and Incidents in Central Africa. Philadelphia: American Sunday-School Union, 1859.
MLA-referens (8:e uppl.)American Sunday-School Union och A. E. P. The Land of Mystery: Or, Scenes and Incidents in Central Africa. American Sunday-School Union, 1859.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.