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.
The next type of board is the longboard or malibu (mal). The main difference in design is that the nose of the longboard is rounded. Other than that there is no real difference, though shortboards tend to have three fins and longboards tend to have a single fin.
Some longboards are also more stable than the others. Some decks are flat, some decks have a concave for stability. The shape of your longboard all depends on your preference and riding style. Length. There is also another part of the longboard that is very important: the length.