APA Style

Edstrom, H. et al (2019). Military strategy of small states : responding to external shocks of the 21 St century (1). New York: Routledge.

MLA Style

Edstrom, Hakan. et al. "Military strategy of small states : responding to external shocks of the 21 St century". 1 New York: Routledge, 2019. หนังสือ (Book).