This is a book reference (Okuda and Okuda 1993). Okuda and Okuda remarked this previously (1993).

This is a journal article reference (Wilcox 1991). Wilcox remarked this previously (1991).

This is a newspaper article reference (Di Rado 1995b). Di Rado remarked this previously (1995b).

This is a newspaper article reference without an author (Activision suing over Star Trek 2003). Activision suing over Star Trek remarked this previously (2003).

This is a magazine article reference (Di Rado 1995a). Di Rado remarked this previously (1995a).

This is a book chapter reference (James 1988). James remarked this previously (1988).

This is a web page reference (Lynch 1996). Lynch remarked this previously (1996).