Schaming, TD; Tomback, DF; Lorenz, TJ (2024). "Clark's Nutcracker (Nucifraga columbiana)". In Sly, ND (ed.). Birds of the World. Ithaca, NY, USA: Cornell Lab of Ornithology. doi:10.2173/bow.clanut.02.
Kirwan, GM; Madge, S; del Hoyo, J; Christie, DA; Collar, N; Moura, N; Boesman, PFD; Pyle, P (2024). "Southern Nutcracker (Nucifraga hemispila)". In Kirwan, GM; Keeney, BK; Smith, MG (eds.). Birds of the World. Ithaca, NY, USA: Cornell Lab of Ornithology. doi:10.2173/bow.eurnut4.01.
Kirwan, GM; Madge, S; del Hoyo, J; Christie, DA; Collar, N; Moura, N; Pyle, P (2024). "Northern Nutcracker (Nucifraga caryocatactes)". In Kirwan, GM; Keeney, BK; Smith, MG (eds.). Birds of the World. Ithaca, NY, USA: Cornell Lab of Ornithology. doi:10.2173/bow.eurnut3.01.
Yousuf, P; Spencer, AJ (2025). "Kashmir Nutcracker (Nucifraga multipunctata), version 2.0". In Sly, ND (ed.). Birds of the World. Ithaca, NY, USA: Cornell Lab of Ornithology. doi:10.2173/bow.sponut1.02.
Giuntoli, Mervin; Mewaldt, L. Richard (1978). "Stomach contents of Clark's nutcrackers collected in western Montana". The Auk. 95 (3): 595–598. doi:10.1093/auk/95.3.595a. JSTOR4085172.
Vander Wall, Stephen B.; Balda, Russell P. (1977). "Coadaptations of the Clark's nutcracker and the pinon pine for efficient seed harvest and dispersal". Ecological Monographs. 47 (1): 89–111. Bibcode:1977EcoM...47...89V. doi:10.2307/1942225. JSTOR1942225.
Vander Wall, Stephen B.; Balda, Russell P. (1977). "Coadaptations of the Clark's nutcracker and the pinon pine for efficient seed harvest and dispersal". Ecological Monographs. 47 (1): 89–111. Bibcode:1977EcoM...47...89V. doi:10.2307/1942225. JSTOR1942225.
Giuntoli, Mervin; Mewaldt, L. Richard (1978). "Stomach contents of Clark's nutcrackers collected in western Montana". The Auk. 95 (3): 595–598. doi:10.1093/auk/95.3.595a. JSTOR4085172.
Vander Wall, Stephen B.; Balda, Russell P. (1977). "Coadaptations of the Clark's nutcracker and the pinon pine for efficient seed harvest and dispersal". Ecological Monographs. 47 (1): 89–111. Bibcode:1977EcoM...47...89V. doi:10.2307/1942225. JSTOR1942225.