Howald et al. 2009, p. 30. Howald, Gregg; Donlan, C. Josh; Faulkner, Kate R.; Ortega, Steve; Gellerman, Holly; Croll, Donald A.; Tershy, Bernie (2009), "Eradication of black rats Rattus rattus from Anacapa Island", Oryx, 1 (44): 30–40, doi:10.1017/S003060530999024X
Howald et al. 2009, p. 35. Howald, Gregg; Donlan, C. Josh; Faulkner, Kate R.; Ortega, Steve; Gellerman, Holly; Croll, Donald A.; Tershy, Bernie (2009), "Eradication of black rats Rattus rattus from Anacapa Island", Oryx, 1 (44): 30–40, doi:10.1017/S003060530999024X
Howald et al. 2009, p. 39. Howald, Gregg; Donlan, C. Josh; Faulkner, Kate R.; Ortega, Steve; Gellerman, Holly; Croll, Donald A.; Tershy, Bernie (2009), "Eradication of black rats Rattus rattus from Anacapa Island", Oryx, 1 (44): 30–40, doi:10.1017/S003060530999024X