APA

Arnold P., Partridge N., . (1992). Tulips. UAS: Laurel Glen Publishing.

Chicago

Arnold Peter, Partridge Nigel, . 1992. Tulips. UAS: Laurel Glen Publishing.

Harvard

Arnold P., Partridge N., . (1992). Tulips. UAS: Laurel Glen Publishing.

MLA

Arnold Peter, Partridge Nigel, . Tulips. UAS: Laurel Glen Publishing. 1992.