APA-čujuhus (7. p.)
Hawkins, W. J., & Willingham, W. F. (1999). Classic houses of Portland, Oregon: 1850-1950. Timber Press.
Chicago-čujuhus (17. p.)
Hawkins, William John, juo William F. Willingham. Classic Houses of Portland, Oregon: 1850-1950. Portland, Or.: Timber Press, 1999.
MLA-čujuhus (9. p.)
Hawkins, William John, juo William F. Willingham. Classic Houses of Portland, Oregon: 1850-1950. Timber Press, 1999.
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