APA
Krause D. G., . (1998). Book of five rings for executive. London: Nicholas Brealey Publishing.
Chicago
Krause Donald G, . 1998. Book of five rings for executive. London: Nicholas Brealey Publishing.
Harvard
Krause D. G., . (1998). Book of five rings for executive. London: Nicholas Brealey Publishing.
MLA
Krause Donald G, . Book of five rings for executive. London: Nicholas Brealey Publishing. 1998.