Gaya APA
SIMPSON, A.
(1991).
NAVIGATION GUIDE VOL. 2: CELESTIAL NAVIGATION
.
Yogyakarta:
BROWN,SON&FERGUSON LIMITED.
Gaya MLA
SIMPSON, ALEXANDER.
"NAVIGATION GUIDE VOL. 2: CELESTIAL NAVIGATION".
Yogyakarta:
BROWN,SON&FERGUSON LIMITED,
1991.
Text.