APA
Seager Joni,, . (1990). The state of the earth : An atlas of environmental concern. London: Unwin Hyman Ltd.
Chicago
Seager Joni,, . 1990. The state of the earth : An atlas of environmental concern. London: Unwin Hyman Ltd.
Harvard
Seager Joni,, . (1990). The state of the earth : An atlas of environmental concern. London: Unwin Hyman Ltd.
MLA
Seager Joni,, . The state of the earth : An atlas of environmental concern. London: Unwin Hyman Ltd. 1990.