APA Style
John., K, ,.
(1989.).
The second world war / John. Keegan
(
1)
.
U.S.A.:
Penguin Book..
MLA Style
John., Keegan, ,.
"The second world war / John. Keegan".
1
U.S.A.:
Penguin Book.,
1989..
หนังสือ (Book).