JOURNAL OF LANDSCAPE ARCHITECTURE: PAST CONTINUOUS IS FUTURE PERFECT.
Chicago-viite (17. p.)JOURNAL OF LANDSCAPE ARCHITECTURE: PAST CONTINUOUS IS FUTURE PERFECT.
MLA-viite (9. p.)JOURNAL OF LANDSCAPE ARCHITECTURE: PAST CONTINUOUS IS FUTURE PERFECT.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.