Gaya APA
Grayson, L, E.
(1987).
Who And How In Planning For Large Companies
.
Hongkong:
Machmillan Education.
Gaya MLA
Grayson, Leslie, E..
"Who And How In Planning For Large Companies".
Hongkong:
Machmillan Education,
1987.
Buku Referensi.