Gaya APA
PRICE, E, C., CHEREMISINOFF, P, N.
(1981).
Biogas production & utilization
.
Michigan:
Ann Arbor Science.
Gaya MLA
PRICE, Elizabeth, C.., CHEREMISINOFF, Paul, N..
"Biogas production & utilization".
Michigan:
Ann Arbor Science,
1981.
Buku.