Παραπομπή σε μορφή APA (7η εκδ.)
Büttikofer, J., Dop, H., & Robinson, P. T. (2013). Travel sketches from Liberia: Johann Büttikofer's 19th century rainforest explorations in West Africa : annotated English edition (Annotated English ed.). Brill.
Παραπομπή σε μορφή Chicago (17η εκδ.)
Büttikofer, Johann, Henk Dop, και Phillip T. Robinson. Travel Sketches from Liberia: Johann Büttikofer's 19th Century Rainforest Explorations in West Africa : Annotated English Edition. Annotated English ed. Leiden ; Boston: Brill, 2013.
Παραπομπή σε μορφή MLA (9th εκδ.)
Büttikofer, Johann, et al. Travel Sketches from Liberia: Johann Büttikofer's 19th Century Rainforest Explorations in West Africa : Annotated English Edition. Annotated English ed. Brill, 2013.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.