APA-ийн эшлэл(7 дахь хэвлэлт)
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.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Büttikofer, Johann, Henk Dop, ба 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.
MLA -ийн эшлэл (9 дэх хэвлэлт)
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.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.