def METHOD_NAME():
    """ Return a list of available reference PSD functions coded in PyCBC.
    Returns
    -------
    list
        Returns a list of names of all reference PSD functions coded in PyCBC.
    """
    pycbc_analytical_psd_list = pycbc_analytical_psds.keys()
    pycbc_analytical_psd_list = sorted(pycbc_analytical_psd_list)
    return pycbc_analytical_psd_list