APA (7 वां संस्करण) प्रशस्ति पत्र

Nicholas Sparks. (2016). Two by two. Grand Central Publishing.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Nicholas Sparks. Two by Two. United State of America: Grand Central Publishing, 2016.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Nicholas Sparks. Two by Two. Grand Central Publishing, 2016.