APA

Grant P. R., Grant B. R., . (1980). Annual variation in finch numbers, foraging and food supply on Isla Daphne Major, Galápagos. : .

Chicago

Grant P R, Grant B R, . 1980. Annual variation in finch numbers, foraging and food supply on Isla Daphne Major, Galápagos. : .

Harvard

Grant P. R., Grant B. R., . (1980). Annual variation in finch numbers, foraging and food supply on Isla Daphne Major, Galápagos. : .

MLA

Grant P R, Grant B R, . Annual variation in finch numbers, foraging and food supply on Isla Daphne Major, Galápagos. : . 1980.