APA Style

LINDBERG, K., HAWKINS, D, E. (1993). Ecotourism: a guide for planners and managers (1). Vermont: The Ecotourism Society.

MLA Style

LINDBERG, KREG., HAWKINS, DONALD, E.. "Ecotourism: a guide for planners and managers". 1 Vermont: The Ecotourism Society, 1993. Text.