The National Register Bulletin titled “How to Complete the National Register Registration Form” provides guidance on categories and style names used for architectural classification. The list was adapted from American Architecture Since 1780: A Guide to Architectural Styles by Marcus Whiffen; Identifying American Architecture by John J.G. Blumenson; What Style Is It? by John Poppeliers, S. Allen Chambers, and Nancy B. Schwartz; and A Field Guide to American Houses by Virginia and Lee McAlester. The categories appearing in capital letters in the far left column, relate to the general stylistic periods of American architecture. The subcategories, appearing in the indented left column, relate to the specific styles or stylistic influences that occurred in each period. The right column list other commonly used terms. The Bulletin directs people to select the categories or subcategories that most closely relate to the period and stylistic character of the property while discouraging use of Other Stylistic Terminology which is not to be used when completing forms for inclusion on the National Register.