एपीए उद्धरण

Beer, J. (1987). Advantages, disadvantages and desirable characteristics of shade trees for coffee, cacao and tea.

शिकागो स्टाइल उद्धरण

Beer, John. Advantages, Disadvantages and Desirable Characteristics of Shade Trees for Coffee, Cacao and Tea. 1987.

एमएलए उद्धरण

Beer, John. Advantages, Disadvantages and Desirable Characteristics of Shade Trees for Coffee, Cacao and Tea. 1987.