Dyfyniad APA

Geographical Society of Philadelphia. Charter, by-laws, list of members. the Society.

Dyfyniad Arddull Chicago

Geographical Society of Philadelphia. Charter, By-laws, List of Members. Philadelphia: the Society.

Dyfyniad MLA

Geographical Society of Philadelphia. Charter, By-laws, List of Members. the Society.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.