Gaya APA
Krause, D, G. (1998).
Lima lingjaran bagi eksekutif = the book of five rings for executives .
Jakarta:
Elex Media Komputindo.
Gaya MLA
Krause, Donald, G..
"Lima lingjaran bagi eksekutif = the book of five rings for executives".
Jakarta:
Elex Media Komputindo,
1998.
Buku.