Gaya APA
Dong-joon, K., Yak-woo, P. (1991).
English town 11 : mystery of nature (Jil. 11, ed. 5).
Korea:
Jung-ang Educational Foundation Inc.
Gaya MLA
Dong-joon, Ko., Yak-woo, Park.
"English town 11 : mystery of nature".
Jil. 11, ed. 5
Korea:
Jung-ang Educational Foundation Inc,
1991.
Text.