All petition papers circulated for the purposes of recall shall be uniform in size and style. The signatures to petitions need not all be appended to one paper, but to each separate part there shall be attached an affidavit of the circulator as provided herein. Each signer shall sign his name in ink or indelible pencil and shall insert after his name his place of residence and the date of signing. There shall appear on each copy of the petition the names and addresses of the same five voters who, as a committee of the petitioners shall be regarded as responsible for the circulation and filing of the petition. This committee shall file a sample copy of the petition with the Clerk of the City before any signatures are solicited or obtained. Attached to each part of the petition, when signed and filed with the Clerk, shall be an affidavit of the circulator thereof that he only personally circulated the foregoing paper, that it bears a stated number of signatures, that each signature was affixed in his presence, and that he believes them to be the genuine signatures of the persons whose names they purport to be.