Gaya APA

Spizman, R, F. (2001). The Thank You Book : Hundreds of Clever, Meaningful, and Purposeful ways to Say Thank You . Atlanta: Longstreet Press.

Gaya MLA

Spizman, Robyn, Freedman. "The Thank You Book : Hundreds of Clever, Meaningful, and Purposeful ways to Say Thank You". Atlanta: Longstreet Press, 2001. Buku PPs Prodi Teknik Kimia.