Harcourt Brace Jovanovich, Duck, S., & Gilmour, R. (1981). Personal relationships. Academic Press, a subsidiary of Harcourt Brace Jovanovich, Publishers.
Citazione stile Chigago Style (17a edizione)Harcourt Brace Jovanovich, Steve Duck, e Robin Gilmour. Personal Relationships. London [i pozostałe]: Academic Press, a subsidiary of Harcourt Brace Jovanovich, Publishers, 1981.
Citatione MLA (9a ed.)Harcourt Brace Jovanovich, et al. Personal Relationships. Academic Press, a subsidiary of Harcourt Brace Jovanovich, Publishers, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.