Gaya APA

Othman, M., Abdullah, N. (1990). A preliminary economic valution of wetland plant species in Peninsular Malaysia. AWB reprint no. 67d . : AWB - Malaysia.

Gaya MLA

Othman, M.S.H.., Abdullah, N.M.R.. "A preliminary economic valution of wetland plant species in Peninsular Malaysia. AWB reprint no. 67d". : AWB - Malaysia, 1990. Text.