APA
Walters S., . (1989). The European garden flora: a manual for the identification of plants cultivated in Europe, both out-of-doors and under glass. Cambridge: Cambridge University Press.
Chicago
Walters S.M, . 1989. The European garden flora: a manual for the identification of plants cultivated in Europe, both out-of-doors and under glass. Cambridge: Cambridge University Press.
Harvard
Walters S., . (1989). The European garden flora: a manual for the identification of plants cultivated in Europe, both out-of-doors and under glass. Cambridge: Cambridge University Press.
MLA
Walters S.M, . The European garden flora: a manual for the identification of plants cultivated in Europe, both out-of-doors and under glass. Cambridge: Cambridge University Press. 1989.