We have double-spaced here for readability, but CSE style does not specify a preferred line spacing in bibliographies. Instead, this decision is left at the publisher's (or your professor's) discretion.
Names and titles are to be alphabetized together. For personal names, alphabetize based on the last name, including any particles ("de," "la," "von," etc) that precede the name. Disregard all punctuation and accent marks in the last name. For titles or organization names, ignore articles such as "a" and "the" (and equivalents in other languages) for alphabetization purposes.
Your bibliography should contain only those works that correspond to a citation in the body of your paper. If you wish to include additional references not cited in your paper, you may provide another list with the title "Additional Reading" or similar.