Gaya APA

Kenya, U. (1977). International Referral System : For Sources Of Enviromental Information (IRS Operations Manual (Pert (A) Attributes.)) . : .

Gaya MLA

Kenya, UNEP. "International Referral System : For Sources Of Enviromental Information (IRS Operations Manual (Pert (A) Attributes.))". : , 1977. Text.