Seferian, H. (2004). Hardscapinghigh, style, low maintenance outdoor spacesHaig Seferian. McGraw-Hill.
Čikaški stil citiranja (17. izdanje)Seferian, Haig. Hardscapinghigh, Style, Low Maintenance Outdoor SpacesHaig Seferian. McGraw-Hill, 2004.
MLA način citiranja (8. izdanje)Seferian, Haig. Hardscapinghigh, Style, Low Maintenance Outdoor SpacesHaig Seferian. McGraw-Hill, 2004.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.