Gaya APA
Widyastuti, P., Yulianti, D.
(2003).
Manajemen Stres : National Safety Council
.
JAKARTA:
EGC.
Gaya MLA
Widyastuti, Palupi., Yulianti, Devi.
"Manajemen Stres : National Safety Council".
JAKARTA:
EGC,
2003.
Text.