APA

streek h. . e., opik h., . (1979). the physialogy of flowering plants. londen: edward arnold ltd.

Chicago

streek h e, opik helgy, . 1979. the physialogy of flowering plants. londen: edward arnold ltd.

Harvard

streek h. . e., opik h., . (1979). the physialogy of flowering plants. londen: edward arnold ltd.

MLA

streek h e, opik helgy, . the physialogy of flowering plants. londen: edward arnold ltd. 1979.