APA
Howell C J, Azizan Haji A S, Graham R C, Nur Iskandar T & Schwabe K A. (2005). Assessment of aboriginal smallholder soils for rubber growth in Peninsular Malaysia. : Soil Science.
Chicago
Howell C J, Azizan Haji A S, Graham R C, Nur Iskandar T and Schwabe K A. 2005. Assessment of aboriginal smallholder soils for rubber growth in Peninsular Malaysia. : Soil Science.
Harvard
Howell C J, Azizan Haji A S, Graham R C, Nur Iskandar T and Schwabe K A. (2005). Assessment of aboriginal smallholder soils for rubber growth in Peninsular Malaysia. : Soil Science.
MLA
Howell C J, Azizan Haji A S, Graham R C, Nur Iskandar T and Schwabe K A. Assessment of aboriginal smallholder soils for rubber growth in Peninsular Malaysia. : Soil Science. 2005.