APA (7 वां संस्करण) प्रशस्ति पत्र

Kriegel Robert. (1991). If it Ain't Broke-- Break it!: And other unconventional wisdom for a changing business world. Warner Books a time warner company.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Kriegel Robert. If It Ain't Broke-- Break It!: And Other Unconventional Wisdom for a Changing Business World. USA: Warner Books a time warner company, 1991.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Kriegel Robert. If It Ain't Broke-- Break It!: And Other Unconventional Wisdom for a Changing Business World. Warner Books a time warner company, 1991.