Larsen, Derek; Watson, John J. (September 2001). "A guide map to the terrain of gift value". Psychology and Marketing. 18 (8): 889–906. doi:10.1002/mar.1034.
Dots and Dashes: Interesting Stories of Progress in the Telegraph Industry, Volumes 3-20, Western Union Telegraph Company, 1927
Ruth, Julie; Otnes, Cele C.; Brunel, Frédéric F. (March 1999). "Gift Receipt and the Reformulation of Interpersonal Relationships". Journal of Consumer Research. 25 (4): 385–402. doi:10.1086/209546. S2CID144827017.
Dryland, Ann (October 1968). "Review". British Journal of Educational Studies. 16 (3): 336–7. doi:10.2307/3119303. JSTOR3119303.
Dots and Dashes: Interesting Stories of Progress in the Telegraph Industry, Volumes 3-20, Western Union Telegraph Company, 1927
Ruth, Julie; Otnes, Cele C.; Brunel, Frédéric F. (March 1999). "Gift Receipt and the Reformulation of Interpersonal Relationships". Journal of Consumer Research. 25 (4): 385–402. doi:10.1086/209546. S2CID144827017.
Dryland, Ann (October 1968). "Review". British Journal of Educational Studies. 16 (3): 336–7. doi:10.2307/3119303. JSTOR3119303.
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Dots and Dashes: Interesting Stories of Progress in the Telegraph Industry, Volumes 3-20, Western Union Telegraph Company, 1927
Ruth, Julie; Otnes, Cele C.; Brunel, Frédéric F. (March 1999). "Gift Receipt and the Reformulation of Interpersonal Relationships". Journal of Consumer Research. 25 (4): 385–402. doi:10.1086/209546. S2CID144827017.
Dryland, Ann (October 1968). "Review". British Journal of Educational Studies. 16 (3): 336–7. doi:10.2307/3119303. JSTOR3119303.