Two or More Works by the Same Author in the Same Year: If you have two sources by the same author in the same year, use lower-case letters (a, b, c) with the year to order the entries in the reference list. Use the lower-case letters with the year in the in-text citation.
Most boards measure 84 to 150 centimetres (33 to 59 in) in length while widths vary from 22.8 to 25.4 centimetres (9.0 to 10.0 in). There are several longboard shapes, such as pintails, swallowtails, flat-nose riders, drop-through decks, drop decks and boards with the same shape as a standard skateboard.
The first is the shortboard, also known as the thruster. This is the type of board that is pictured below. It's a board used to perform quick maneuvers on waves and is the most popular type of surfboard design. The size of these shortboards is generally from around 5'8'' to 6'10''. The Shortboard. The next type of board is the longboard or malibu (mal).