APA
sargent m., . (1981). economics in horticulture. london: english language book society & macmillan.
Chicago
sargent m.j, . 1981. economics in horticulture. london: english language book society & macmillan.
Harvard
sargent m., . (1981). economics in horticulture. london: english language book society & macmillan.
MLA
sargent m.j, . economics in horticulture. london: english language book society & macmillan. 1981.
