Ross, Malcolm (2008). "Other cultivated plants". Dalam Ross, Malcolm; Pawley, Andrew; Osmond, Meredith (penyunting). The lexicon of Proto Oceanic: The culture and environment of ancestral Oceanic society. Volume 3: Plants. Pacific Linguistics. m/s. 389–426. ISBN9780858835894. |volume= has extra text (bantuan)
Applequist, Wendy L.; Lebot, Vincent (25 April 2006). "Validation of Piper Methysticum var. wichmannii (Piperaceae)". Novon: A Journal for Botanical Nomenclature. 16 (1): 3–4. doi:10.3417/1055-3177(2006)16[3:VOPMVW]2.0.CO;2.[pautan mati]
Kuchta, Kenny; Schmidt, Mathias; Nahrstedt, Adolf (1 Disember 2015). "German Kava Ban Lifted by Court: The Alleged Hepatotoxicity of Kava (Piper methysticum) as a Case of Ill-Defined Herbal Drug Identity, Lacking Quality Control, and Misguided Regulatory Politics". Planta Medica. 81 (18): 1647–1653. doi:10.1055/s-0035-1558295. ISSN1439-0221. PMID26695707.
Showman, A. F.; Baker, J. D.; Linares, C; Naeole, C. K.; Borris, R; Johnston, E; Konanui, J; Turner, H (2015). "Contemporary Pacific and Western perspectives on 'awa (Piper methysticum) toxicology". Fitoterapia. 100: 56–67. doi:10.1016/j.fitote.2014.11.012. PMID25464054.
drugs.com
"Kava". Drugs.com. 3 Januari 2018. Dicapai pada 12 Januari 2018.
Kuchta, Kenny; Schmidt, Mathias; Nahrstedt, Adolf (1 Disember 2015). "German Kava Ban Lifted by Court: The Alleged Hepatotoxicity of Kava (Piper methysticum) as a Case of Ill-Defined Herbal Drug Identity, Lacking Quality Control, and Misguided Regulatory Politics". Planta Medica. 81 (18): 1647–1653. doi:10.1055/s-0035-1558295. ISSN1439-0221. PMID26695707.
Showman, A. F.; Baker, J. D.; Linares, C; Naeole, C. K.; Borris, R; Johnston, E; Konanui, J; Turner, H (2015). "Contemporary Pacific and Western perspectives on 'awa (Piper methysticum) toxicology". Fitoterapia. 100: 56–67. doi:10.1016/j.fitote.2014.11.012. PMID25464054.
Ross, Malcolm (2008). "Other cultivated plants". Dalam Ross, Malcolm; Pawley, Andrew; Osmond, Meredith (penyunting). The lexicon of Proto Oceanic: The culture and environment of ancestral Oceanic society. Volume 3: Plants. Pacific Linguistics. m/s. 389–426. ISBN9780858835894. |volume= has extra text (bantuan)
Kuchta, Kenny; Schmidt, Mathias; Nahrstedt, Adolf (1 Disember 2015). "German Kava Ban Lifted by Court: The Alleged Hepatotoxicity of Kava (Piper methysticum) as a Case of Ill-Defined Herbal Drug Identity, Lacking Quality Control, and Misguided Regulatory Politics". Planta Medica. 81 (18): 1647–1653. doi:10.1055/s-0035-1558295. ISSN1439-0221. PMID26695707.