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Ransom, C.; Robinson, P.T.; Collen, B. (2015). "Choeropsis liberiensis". 2015: e.T10032A18567171. doi:10.2305/IUCN.UK.2015-2.RLTS.T10032A18567171.en. ; Database entry includes a brief justification of why this species is of endangered.
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KIEH, JR., GEORGE KLAY. "THE MODEL CITY STATUTE FOR THE LIBERIAN CITY"(PDF). Governance Commission of Liberia. GOVERNANCE COMMISSION OF THE REPUBLIC OF LIBERIA. Diarsipkan dari asli(PDF) tanggal April 12, 2019. Diakses tanggal July 20, 2018.
Shannon, Eugene H. (December 31, 2009). "Annual report"(PDF). Liberian Ministry of Lands, Mines and Energy. Diarsipkan dari asli(PDF) tanggal April 10, 2011. Diakses tanggal May 1, 2010.
Wilcox, Michael D., Jr. Department of Agricultural Economics University of Tennessee (2008). "Reforming Cocoa and Coffee Marketing in Liberia"(PDF). Presentation and Policy Brief. University of Tennessee. Diarsipkan dari asli(PDF) tanggal June 24, 2010. Diakses tanggal April 25, 2010. Pemeliharaan CS1: Banyak nama: authors list (link)
KIEH, JR., GEORGE KLAY. "THE MODEL CITY STATUTE FOR THE LIBERIAN CITY"(PDF). Governance Commission of Liberia. GOVERNANCE COMMISSION OF THE REPUBLIC OF LIBERIA. Diarsipkan dari asli(PDF) tanggal April 12, 2019. Diakses tanggal July 20, 2018.
"CIA The World Factbook". Appendix G: Weights and Measures. US Central Intelligence Agency. 2010. Diarsipkan dari asli tanggal April 24, 2010. Diakses tanggal April 24, 2010.
Wilcox, Michael D., Jr. Department of Agricultural Economics University of Tennessee (2008). "Reforming Cocoa and Coffee Marketing in Liberia"(PDF). Presentation and Policy Brief. University of Tennessee. Diarsipkan dari asli(PDF) tanggal June 24, 2010. Diakses tanggal April 25, 2010. Pemeliharaan CS1: Banyak nama: authors list (link)
Government of Liberia (2008). "County Development Agendas". Government of the Republic of Liberia. Diarsipkan dari asli tanggal January 14, 2010. Diakses tanggal May 1, 2010.
Shannon, Eugene H. (December 31, 2009). "Annual report"(PDF). Liberian Ministry of Lands, Mines and Energy. Diarsipkan dari asli(PDF) tanggal April 10, 2011. Diakses tanggal May 1, 2010.
Moumouni, Guillaume. (April 2014). "China and Liberia: Engagement in a Post-Conflict Country 2003–2013". Global Powers and Africa Programme. Occasional Paper No. 182[pranala nonaktif permanen]. Johannesburg, South Africa: The South African Institute of International Affairs (SAIIA). p. 8.