APA

CHESTERTON G., LEWIS C. S., . (1989). The riddle of joy. Auckland: Collins.

Chicago

CHESTERTON G.K, LEWIS C S, . 1989. The riddle of joy. Auckland: Collins.

Harvard

CHESTERTON G., LEWIS C. S., . (1989). The riddle of joy. Auckland: Collins.

MLA

CHESTERTON G.K, LEWIS C S, . The riddle of joy. Auckland: Collins. 1989.