APA Style
Khan, I., Burki, S.J., Pasha, A.G., Waqar, A., Root, H., Khawaja, S., Sher, M., Schmidt,W.C. (1990).
Proceedings--Symposium on Whitebark Pine Ecosystems: Ecology and Management Of a High-Mountain Resource Bozeman,MT, March 29-31, 1989 (USDA) .
Ogden, Utah:
USDA Forest Service.
Chicago Style
Khan, I., Burki, S.J., Pasha, A.G., Waqar, A., Root, H., Khawaja, S., Sher, M., Schmidt,W.C.
Proceedings--Symposium on Whitebark Pine Ecosystems: Ecology and Management Of a High-Mountain Resource Bozeman,MT, March 29-31, 1989 (USDA).
Ogden, Utah:
USDA Forest Service,
1990.
.
MLA Style
Khan, I., Burki, S.J., Pasha, A.G., Waqar, A., Root, H., Khawaja, S., Sher, M., Schmidt,W.C.
Proceedings--Symposium on Whitebark Pine Ecosystems: Ecology and Management Of a High-Mountain Resource Bozeman,MT, March 29-31, 1989 (USDA).
Ogden, Utah:
USDA Forest Service,
1990.
.
Turabian Style
Khan, I., Burki, S.J., Pasha, A.G., Waqar, A., Root, H., Khawaja, S., Sher, M., Schmidt,W.C.
Proceedings--Symposium on Whitebark Pine Ecosystems: Ecology and Management Of a High-Mountain Resource Bozeman,MT, March 29-31, 1989 (USDA).
Ogden, Utah:
USDA Forest Service,
1990.
.